Google has removed that feature long ago
Haha.. Obviously you don't know what you are talking about. I remember seeing it in either this ROM or ported version of RR-N by mshoaib7 ( I don't remember which)
How do I disable a particular SIM card?
Can't find that option (or is that option disabled?)
I've tried flashing both 3.0.2 & 3.1.0 via adb fastboot with pc. But I can't get into recover after, it's stuck at the logo screen. I'm on kitkat, any advice?
Update to latest stock lollipop using OTA. Then flash latest TWRP using ADB...